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EP2814650A1 - Dispositif destiné à être utilisé dans un moule pour le thermoformage du type fournissant une surface courbée à double courbure pouvant être reconfigurée dynamiquement présentant une structure ouverte - Google Patents

Dispositif destiné à être utilisé dans un moule pour le thermoformage du type fournissant une surface courbée à double courbure pouvant être reconfigurée dynamiquement présentant une structure ouverte

Info

Publication number
EP2814650A1
EP2814650A1 EP13735766.1A EP13735766A EP2814650A1 EP 2814650 A1 EP2814650 A1 EP 2814650A1 EP 13735766 A EP13735766 A EP 13735766A EP 2814650 A1 EP2814650 A1 EP 2814650A1
Authority
EP
European Patent Office
Prior art keywords
shaped elements
ribbon
rod
curved
elastically deformable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13735766.1A
Other languages
German (de)
English (en)
Other versions
EP2814650B1 (fr
EP2814650A4 (fr
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ADAPA APS
Original Assignee
ADAPA APS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ADAPA APS filed Critical ADAPA APS
Publication of EP2814650A1 publication Critical patent/EP2814650A1/fr
Publication of EP2814650A4 publication Critical patent/EP2814650A4/fr
Application granted granted Critical
Publication of EP2814650B1 publication Critical patent/EP2814650B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/308—Adjustable moulds

Definitions

  • the present invention relates to a device for use in a mould for thermoform- ing, the moulds of the type providing a curved, double-curved, dynamically recon- figurable surface with an open structure.
  • Digitally-controlled moulds that have the ability to produce a physical representation of a digitally designed surface quickly and precisely, based on data from a CAD program are advantageous when producing series of unique curved and double-curved blanks.
  • the most widely used technique for production of individual moulds from digital drawings is to shape the mould from a block of suitable material using a CNC machine. This is an extended process when a precise surface is required, and there is a lot of waste of both energy and materials. This means that moulds are becoming more expensive, due to increasing costs of both labour and materials.
  • a branch of such dynamically reconfigurable thermoforming moulds includes moulds that are intended to create even points on single- and double- curved surfaces for use in e.g. production of individually manufactured facade elements in organically-shaped architecture.
  • a number of attempts have been made to produce such a mould, and all of them shared a common factor of a large or small number of actuators, each of which defines a point on a surface.
  • One end of the actuators is fixed to a frame, and membranes or plates are attached to their free ends, if necessary supported by a network of flexible profiles that are intended to form a surface that can be used for casting, etc.
  • FR 2612545 A and US 5,851 ,563 describe a mould apparatus in which a number of actuators are arranged in a rectangular pattern, controlled individually in the longitudinal direction by a computer/processor. On a ball joint on the free end of each actuator a rectangular plate is fitted, partly overlapping adjacent plates in such a way that the plates together form a sealed surface. The surface so formed is thus divided up into large or small surfaces, depending on the number of actuators and their common spacing.
  • One problem with the prior art apparatus is that only when there is a large number of closely-spaced actuators will the surface produced appear uniform, but will still consist of a number of flat facets, as the rectangular plates will not provide even transitions and continual curves. In addition to that, closely-spaced actuators is a significantly more expensive solution.
  • GB 2268699 A describes an apparatus for forming glass fibre-reinforced plastic laminates, in which an elastically deformable material is supported by a number of distributed actuators.
  • the addition of fibres in the laminate achieves rigidity, and the actuators are used to force the basically flat laminate to assume a single- or double-curved shape. This takes place in several stages, in which the addition of the fibre adds rigidity to the laminate prior to a deformation a number of times, after which further fibre is added and the laminate is cured so that it maintains the new shape.
  • the patent indicates, to achieve an even surface, in relation to the aforementioned mould apparatus, with continued curves with a spacing between the actuators of 50 cm to 100 cm, as the rigidity of the laminate results in an interpolation between the points defined by the actuators.
  • One advantage with the prior art apparatus is that an even, continual surface is achieved using relatively few actuators.
  • One problem with the apparatus is that the surface precision depends on the ability during the process to control the rigidity of the laminate, which means that the apparatus can only be used for production of laminates.
  • the fine level of control of rigidity requires a relatively high, and cost-increasing, complexity of machinery, processes and calculations.
  • US 4,522,641 indicates a process for production of three-dimensional glass 5 elements in which a rectangular grid of interwoven elastically deformable supports are connected in nodal points to an underlying adjustable system of e.g. actuators.
  • an underlying adjustable system of e.g. actuators.
  • the rigidity of the interwoven supports forms the curves in the direction of the grid, between the nodal points defined by the underlying adjustable system.
  • a sheet or o plate of elastically deformable material is placed in multiple layers over the grid, where it provides a sealed and heat-insulated surface that can be used to cast glass elements.
  • the object of this invention is to provide a device of the type described in the o introduction that will provide an easy and fast process for creating a single- or double-curved surface using few actuators in relation to the possible curves.
  • a further object of the invention is that the established closely-spaced points on the surface are evenly and uniformly distributed with continual curves in all di- 5 rections.
  • a still further object of the invention is to be able to ventilate above, below and between the points on the surface.
  • a device of the nature described introductorily that is characterised by the curved, double-curved dynamically reconfigurable surface with the open structure being defined by interpolation between the spaced rod- and/or ribbon-shaped elements, consisting of a flexible system comprising a number of angled layers of spaced point-supported parallel rod- and/or ribbon-shaped elements of elastically deformable material, in which relatively offset fixing points for the point-supported rod- and/or ribbon-shaped elements via the upward-facing, highest located surfaces of the rod- or ribbon- 5 shaped elements, define the double-curved dynamically reconfigurable surface.
  • the double-curved dynamically reconfigurable surface instead of consisting of well-defined points, is actually formed by interpolation between a number of parallel continuous line-shaped rods that make up an infinite number of points, o which produces a more even surface than that which is obtainable using the prior art segmented and/or interwoven supports.
  • the 5 internally relatively angled layers of the rod- and/or ribbon-shaped elements in the device according to the invention can vary in thickness or rigidity.
  • the device incorporating the flexible system of internally relatively angled layers of spaced point-supported parallel continuous rod- and/ribbon-shaped elements of elastically deformable mate- 5 rial must be arranged in such a way that they form support points with variable spacing between adjacent support points, the spacing ranging from 0 to 100 cm.
  • the curved, dynamically reconfigurable double-curved surface with an open structure can also advantageously be provided using an underlying flexible system consisting of internally displaceable, rod- and/or ribbon-shaped elements of elasti- cally deformable material arranged in two or more internally relatively angled layers that, in the device's usage state, are deflected and can cause relative displacements between the rod- or ribbon-shaped elements.
  • This extremely open, grid-shaped structure that occurs between the internally relatively angled layers of rod- and/or ribbon-shaped elements of elastically deformable material, permits good ventilation below and within the dynamically re- configurable surface, and at the same time as its surface is evenly curved with good support for the surface, or a flexible coating applied to it.
  • the deflection of the internally dis- placeable rod- and/or ribbon-shaped elements of elastically deformable material5 from an initial shape can be performed by the application of a force resulting from the movable free ends of a number of linear actuators, e.g. of the electromechanical type, to which the rod- and/or ribbon-shaped elements of elastically deformable material are mechanically connected in such a way that the position of a given point on the surface is determined from the position of the free end of an associ- o ated given actuator.
  • a number of linear actuators e.g. of the electromechanical type
  • the device according to the invention can be provided with registration units that register data regarding the positions of the free ends of the respective linear actuators that are mechani- o cally connected to the rod- or ribbon-shaped elements of elastically deformable material, the data being registered and sent to a computer processing unit with signal sensors for controlling the movement of the individual actuators' free ends, and thus the point in the flexible system that belongs to the free end of the actuator, to a pre-defined position.
  • each individual actuator can independently be brought to assume a pre-defined position which means that the points on the surface that are formed by the flexible system can be made to create a course through a series of defined points, that could, for example, be read off from a digital presentation of a surface.
  • An especially preferred embodiment of the device according to the invention is characterised in that the ribbon-shaped elements of elastically deformable material in internally relatively angled layers at the first retaining mechanisms are dis- placeably and/or tiltably journaled to the various free ends of the actuators, and that on the ribbon-shaped elements between the actuators there are second dis- placeably journaled retaining mechanisms and third displaceably journaled retain- ing mechanisms for spaced, parallel rod-shaped elements of elastically deformable material, in which retaining mechanisms the spaced, parallel rod- and/or ribbon-shaped elements of elastically deformable material, are displaceably journaled, and which retaining mechanisms on the opposite side of the ribbon-shaped elements of elastically deformable material include a fourth retaining mechanism for spaced, parallel rod-shaped elements that are angled relatively to the ribbon- shaped elements.
  • the rod- and/or ribbon-shaped elements of elastically deformable material may be internally connected with springs, the number and location of which depend on the potential deflection of the deflected reconfigurable double-curved surface.
  • at least one of the springs' spring constants may be adjustable.
  • the spring constants for the springs may be individually adjustable by means of actuators connected to a control unit that is connected to a computer processing unit for control- ling the respective springs' spring constants.
  • Fig. 1 is a perspective view of the device for use in a mould for thermoform- ing, for moulds of the type that provide a curved double-curved, dynamically reconfigurable surface,
  • Fig. 2 is a cross-section along the line A ' -A ' , shown in Fig. 1
  • Fig. 3 is a perspective view of the device shown in Fig 1 , in which part of the upper section is hidden, and
  • Fig. 4 is a detailed view of an embodiment of a first retaining mechanism for the ribbon-shaped elements of an elastically deformable material in internally an- gled layers.
  • Fig. 1 is a perspective view of device 2 for use in a mould for thermoforming, for moulds of the type that provide a curved double-curved, dynamically reconfigurable surface, with an open structure.
  • the curved, double-curved dynamically reconfigurable surface 4 with an open structure is defined by a flexible system consisting of a number of angled layers 6, 8, 10, 12, 14 of spaced point-supported parallel rod- and/or ribbon- shaped elements 16, 18, 20, 22, 24 of elastically deformable material, in which the upward-facing, highest surfaces 26 of the rod- or ribbon-shaped elements 14, 16,
  • the highest located surfaces 26 of the rod- shaped elements 24, define the double-curved reconfigurable surface 4 by relative displacements between the fixing points 28, 30, 32, 34 for the point-supported rod- or ribbon-shaped elements 14,16, 18, 20, 24.
  • it is the layers 6, 8, consisting of the relatively angled ribbon-shaped elements 16, 18 that are supported in fixing points 28.
  • Layers 10, 12, that are made up of the rod-shaped elements 20, 22 consist- ing of elastically deformable material, are supported in the fixing points 30, 32, that are made up of brackets that are displaceably journaled in layers 8, 6 of the ribbon-shaped elements 18, 16, which are indicated by arrows C and D in Fig. 3.
  • Layer 4 which in the embodiment shown is made up of rod-shaped elements 24 of elastically deformable material, whose upward-facing, highest located surface 26 defines the curved, double-curved, dynamically reconfigurable surface 4, is journaled on brackets 34 that are displaceably journaled to the rod- shaped elements 20, 22.
  • the rod-shaped elements 24 are spaced with a predefined fixed spacing 36, which is adapted to the relevant use of the mould, in which the device according to the invention is incorporated.
  • layers 6, 8, 10, 12, 14 that are made from rod- or ribbon-shaped elements 16, 18, 20, 22, 24 are rotated relatively with an angle of 90 degrees in relation to each other.
  • the internally relative angled layers 6, 8, 10, 12, 14 of the rod- and/or ribbon- shaped elements 16,18, 20, 22, 24 may vary in thickness and/or in rigidity, depending on which load they are calculated to be able to withstand.
  • the flexible system of internally relatively an- gled layers 6, 8, 10, 12, 14 of spaced, point-supported parallel rod- and/or ribbon- shaped elements 16, 18, 20, 22, 24 of elastically deformable material is arranged in such a way that they form support points 28, 30, 32, 34, the spacing of which between the adjacent support points 30, 32, 34 may have varied spacing 38, 40, 42, the spacing ranging from 0 to 100 cm.
  • the device 2 according to the invention can also include non-shown registration units that register data concerning the positions of the free ends 44 of actuators 46, which are mechanically connected to the rod- and/or ribbon-shaped elements 16, 18 of elastically deformable material, respectively, the data being regis- tered and sent to a non-shown data processing unit with sensors (not shown) for controlling the movement of the free ends 44 of the individual actuators, and thus to the point in the flexible system that belongs to the actuator's free end, to a preferred position.
  • a non-shown data processing unit with sensors (not shown) for controlling the movement of the free ends 44 of the individual actuators, and thus to the point in the flexible system that belongs to the actuator's free end, to a preferred position.
  • the free ends 44 of the actuators 46 are connected to ribbon-shaped elements 16, 18 of elastically deformable material, with first retaining mechanisms 28 with orthogonally-oriented, slit-shaped through-going apertures 48, 50, for reception of the internally angled layers of the ribbon-shaped elements 16, 18 of elastically deformable material, allowing for relative displacement between the free end 44 of actuator 46 and the ribbon-shaped elements 16, 8 of elastically deformable material, controlled in the slit-shaped apertures 48, 50, as indicated by arrows A and B in Fig. 4.
  • Said retaining mechanisms 28 are so located that the ribbon-shaped elements 16, 18 of elastically deformable material will always be affected by a force at right angles, oriented in extension of the free end 44 of actuator 46.
  • the rod-shaped elements 20, 22 there are further support points in the form of displaceably journaled fourth retaining mechanisms 34, on whose upward- facing side 52 there are journaled parallel rod-shaped elements 24, whose up- ward-facing sides 26 together form the curved, double-curved dynamically recon- figurable surface 4.
  • the spacing 36, between the rod-shaped elements 24, is typically selected based on the use of the relevant mould, in which device 2 according to the invention is incorporated. It is primarily the upward-facing sides 26 of the parallel rod-shaped elements 24 of elastically deformable material, journaled in the fourth retaining mechanisms 34, that together form the double-curved reconfigurable surface 4.
  • said upward-facing sides of the rod-shaped elements 24 of elasti- cally deformable material cannot, in themselves, make up the actual flat surface on which e.g. a liquid cast is distributed, but in such cases only serve as subsurface for e.g. a mat that is specially created for the purpose from suitable flexible material, on which the casting is actually performed.
  • the upward-facing sides 26 of the rod-shaped elements 24 of elastically deformable material thus form a dynamically reconfigurable support for the above mat, whose shape adapts to the underlying shape made by the upward-facing sides 26 of the rod-shaped elements 24 made from elastically deformable material.
  • the upward-facing sides 26 of the rod-shaped elements 24 of elastically deformable material in a density appropriate to the purpose between the rod-shaped elements 24, could probably in themselves serve as a sub-surface for moulding said blanks.
  • the rod- and/or ribbon-shaped elements 20, 22 of elastically deformed material are internally connected to springs 54, the number and location of which depend on the potential deflection of the deflected reconfigurable double-curved surface 4.
  • At least one of the springs' spring constants may be adjustable.
  • all of the springs' spring constants may be individually adjustable by means of actuators that are not illustrated, connected to a control unit that is not illustrated, which is connected to a data processing unit not illustrated for controlling the springs' spring constants.
  • Device 2 also comprises the underlying plates 56, 58 through which the actuators 46 are led for the purpose of stiffening and protecting them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif (2) destiné à être utilisé dans des moules de thermoformage du type fournissant une surface courbée à double courbure pouvant être reconfigurée dynamiquement (4) présentant une structure ouverte, caractérisé en ce que la surface courbée à double courbure pouvant être reconfigurée dynamiquement (4) présentant la structure ouverte est définie par interpolation entre des éléments en forme de tiges et/ou de rubans espacés (16, 18, 20, 22, 24) composés d'un système flexible comprenant un certain nombre de couches inclinées (6, 8, 10, 12, 14) d'éléments espacés en forme de tiges et/ou de rubans parallèles supportés ponctuellement (16, 18, 20,22, 24) composés d'un matériau élastiquement déformable, dans lequel des points d'ancrage décalés les uns par rapport aux autres (28, 30, 32, 34) pour les éléments en forme de tiges et/ou de rubans supportés ponctuellement (16,18, 20, 22, 24) par le biais des surfaces supérieures dirigées vers le haut (26) des éléments en forme de tiges et/ou de rubans (24) définissent la surface à double courbure pouvant être reconfigurée (4). Les points d'ancrage (28) sont raccordés aux extrémités libres (44) d'actionneurs (46) pouvant être déplacés indépendamment les uns des autres, généralement commandés et régulés au moyen du traitement d'une interface et de données électroniques, ce qui permet qu'une surface à double courbure donnée puisse toujours être recréée.
EP13735766.1A 2012-01-13 2013-01-11 Dispositif destiné à être utilisé dans un moule pour le thermoformage du type fournissant une surface courbée à double courbure pouvant être reconfigurée dynamiquement présentant une structure ouverte Active EP2814650B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201200035 2012-01-13
PCT/DK2013/050010 WO2013104369A1 (fr) 2012-01-13 2013-01-11 Dispositif destiné à être utilisé dans un moule pour le thermoformage du type fournissant une surface courbée à double courbure pouvant être reconfigurée dynamiquement présentant une structure ouverte

Publications (3)

Publication Number Publication Date
EP2814650A1 true EP2814650A1 (fr) 2014-12-24
EP2814650A4 EP2814650A4 (fr) 2015-12-23
EP2814650B1 EP2814650B1 (fr) 2017-12-13

Family

ID=48781059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13735766.1A Active EP2814650B1 (fr) 2012-01-13 2013-01-11 Dispositif destiné à être utilisé dans un moule pour le thermoformage du type fournissant une surface courbée à double courbure pouvant être reconfigurée dynamiquement présentant une structure ouverte

Country Status (4)

Country Link
EP (1) EP2814650B1 (fr)
DK (1) DK2814650T3 (fr)
ES (1) ES2660403T3 (fr)
WO (1) WO2013104369A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700033240A1 (it) * 2017-03-27 2018-09-27 Stamtech S R L Apparecchiatura perfezionata per la modellazione di prodotti
AU2019215797B2 (en) * 2018-01-31 2025-02-27 The University Of Melbourne A variable shaping form
CN115195091A (zh) * 2022-05-27 2022-10-18 肖丽丽 一种可变型模具平台装置及曲面件的制备方法
CN114770439B (zh) * 2022-06-02 2023-03-21 吉林大学 一种用于曲面件的柔性多点支撑装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527783A (en) * 1983-04-26 1985-07-09 Grumman Aerospace Corporation Universal contoured parts holding fixture
US4897102A (en) * 1989-03-14 1990-01-30 Libbey-Owens-Ford Co. Glass sheet press bending mold
GB2268699B (en) * 1992-07-16 1996-09-18 British Aerospace Forming fibre reinforced plastics laminates
FR2829721B1 (fr) * 2001-09-18 2007-02-23 Alexandre Udin Dispositif pour la fabrication par thermoformage de voiles a courbure tridimensionnelle

Also Published As

Publication number Publication date
DK2814650T3 (en) 2018-03-12
ES2660403T3 (es) 2018-03-22
EP2814650B1 (fr) 2017-12-13
WO2013104369A1 (fr) 2013-07-18
EP2814650A4 (fr) 2015-12-23

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